Bogie for railway-vehicles



,UNHD-STTEIS mum-'wwe HERMANN Lrrzcinrmor AND JACOB wnnz, or GENEVA, SWITZERLAND;

" `Biosriiroit RAILWAY-VEHCLES. 7

i Specification of Letters Patent. Patented Sept. 27, 1921- Applicati'on filed July 21, 1920. Serial No. 398,025.

mechanism on the driving axle frames of` railway vehicles which, on the one hand, contains in its interior a driving shaft for one axle of the bogie coupled through a universal coupling, and, on the other hand, is connected with the main frame of the vehicle by means of a universal joint in such a manner that itv can automatically move aside at curves of the track, 'and thereby the bogie axle can adjust itself radially to the curve.

It is already knowmin driven bogies of railway vehicles to insert universal joints or the like between the motor and the bogie axle kin order to allow rocking of the bogie in traversing` curves of the line. it has already been proposed to arrange the driving motor on the bogie itself. From these known arrangements the present invention is distinguished by the fact that the connection of the motor fixed on the main frame of the vehicle, `with the bogie having a slide guiding on the main frame, is realized by means of a hollow drive and draw bracket or framework inclosing the driving shaft, coupled rigidly with the bogie, but by articulation with the motor, and arranged to transmit the driving as well as the drawing strains of the mechanisms. The improved hollow bracket thus acts so as to transmit the drawing force from the running wheel to the vehicle and through its interior drive to transfer the rotating force from the motor to the running wheel. This arrangement gives rise to a simple and compact drive and draw device forthe bogie with a fixed motor on the vehicle frame, which is quite different from the usual universal joint drive.

The accompanying drawing represents an embodiment ofthe present invention;

Figure l shows an example of application of the same;

Moreover,

Fig. 2 isa horizontal longitudinal section through the drivingV and drawing bar.

The hollow body or bracket a of the new driving andd drawing bar is articulated by means of the two-part socket Z) and the head piece ,c of a spherical joint on the motor` frame d fixed to the main frame of the vehicle. It contains within it a drivingshaft e supported therein, which on the one hand is connectedy byy means yof the conical gear f to the driven axle g of the bogie, while on the other handit is positively connected by a Cardan joint 7L to the shaft i of the driving motor. In this way, the drive is transmitted.

from the motor to the bogie axle g. In track curves, owing to the swiveling motion ofthe driving bar in the spherical joint b, c, the

bogie is allowed to automatically displace itself laterally without affecting the positive driveof its driven axle g, the driving shaft e being also allowed to suit to this lateral displacement by virtue ofits connection in the Cardan joint h, Further, oscillations of the driving bar upward or downward are allowed to take-place by means of the said joints without hindering in any way the positive drive. Thus, a free mobility of the driving bar to all sides is obtained while permanently maintaining the positive drive of the driven bogie axle g.

Instead of the spherical joint l), @,azthere may also be employed a Cardan joint; in analogous manner the inner Cardan joint could be replaced by a spherical joint. By the term universal joint we understand these kinds of joints as well as any other articulationv joint which allow of oscillatory movement to all sides. Obviously the bogie, which according to Fig. 2h has one single axle, may also comprise two axles of which the one would serve as driving axle, while the other would be connected to the first one by means of crank gear, toothedl gear and the like.

W'hat we claim is:

In a drive and draw devicefor bogies of railway vehicles, a driving axle on the bogie, a driving and drawing hollow bracket coupled to said axle, a rotary driving shaft within said bracket, a motor fixed on the main frame of the vehicle to actuate said nga the latter to said motor, power trans'- inission means between said driving shaft and the driving axle of the bogie and a unversal joint for connecting the hollow bracket to the lnan freine of the Vehicle,

substantall as and for the ur ose de- 'l scribed.

In Witness whereof We have hereunto signed our names this 6th day of July, 1920,

in the ,presence of two subscribing Witnesses. 10

HERMANN LIECHTY. JACOB WERZ. 

